[U-Boot] [RFC] Add 'led' command

[Jason Kridner]

It is desired to have the led command on the BeagleBoard to allow for some
interaction in the scripts.

This patch allows any board implementing the coloured LED API
to control the LEDs from the console.

led [green | yellow | red | all ]  [ on | off ]

or

led [ 1 | 2 | 3 | all ]  [ on | off ]

Adds configuration item CONFIG_CMD_LED enabling the command.

Partially based on patch from Ulf Samuelsson:
http://www.mail-archive.com/u-boot@lists.denx.de/msg09593.html.

Signed-off-by: Jason Kridner <jkridner at beagleboard.org>
---
 common/Makefile  |    1 +
 common/cmd_led.c |  207 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 208 insertions(+), 0 deletions(-)
 create mode 100644 common/cmd_led.c

diff --git a/common/Makefile b/common/Makefile
index 2c37073..40facb5 100644
--- a/common/Makefile
+++ b/common/Makefile
@@ -107,6 +107,7 @@ COBJS-$(CONFIG_CMD_IRQ) += cmd_irq.o
 COBJS-$(CONFIG_CMD_ITEST) += cmd_itest.o
 COBJS-$(CONFIG_CMD_JFFS2) += cmd_jffs2.o
 COBJS-$(CONFIG_CMD_CRAMFS) += cmd_cramfs.o
+COBJS-$(CONFIG_CMD_LED) += cmd_led.o
 COBJS-$(CONFIG_CMD_LICENSE) += cmd_license.o
 COBJS-y += cmd_load.o
 COBJS-$(CONFIG_LOGBUFFER) += cmd_log.o
diff --git a/common/cmd_led.c b/common/cmd_led.c
new file mode 100644
index 0000000..3b7b534
--- /dev/null
+++ b/common/cmd_led.c
@@ -0,0 +1,207 @@
+/*
+ * (C) Copyright 2010
+ * Jason Kridner <jkridner at beagleboard.org>
+ *
+ * Based on cmd_led.c patch from:
+ * http://www.mail-archive.com/u-boot@lists.denx.de/msg06873.html
+ * (C) Copyright 2008
+ * Ulf Samuelsson <ulf.samuelsson at atmel.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+/*
+ * This file provides a shell like 'test' function to return
+ * true/false from an integer or string compare of two memory
+ * locations or a location and a scalar/literal.
+ * A few parts were lifted from bash 'test' command
+ */
+
+#include <common.h>
+#include <config.h>
+#include <command.h>
+#include <status_led.h>
+
+int do_led ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[] )
+{
+#ifdef CONFIG_BOARD_SPECIFIC_LED
+	led_id_t mask;
+#endif
+	int state;
+
+	/* Validate arguments */
+	if ((argc != 3)){
+		printf("Usage:\n%s\n", cmdtp->usage);
+		return 1;
+	}
+
+	if (strcmp(argv[2], "off") == 0) {
+		state = 0;
+	} else if (strcmp(argv[2], "on") == 0) {
+		state = 1;
+	} else {
+		printf ("Usage:\n%s\n", cmdtp->usage);
+		return 1;
+	}
+
+#if defined(STATUS_LED_BIT) && defined(CONFIG_BOARD_SPECIFIC_LED)
+	if (strcmp(argv[1], "0") == 0) {
+		mask = STATUS_LED_BIT;
+		__led_set(mask, state);
+	}
+	else
+#endif
+#if defined(STATUS_LED_BIT1) && defined(CONFIG_BOARD_SPECIFIC_LED)
+	if (strcmp(argv[1], "1") == 0) {
+		mask = STATUS_LED_BIT1;
+		__led_set(mask, state);
+	}
+	else
+#endif
+#if defined(STATUS_LED_BIT2) && defined(CONFIG_BOARD_SPECIFIC_LED)
+	if (strcmp(argv[1], "2") == 0) {
+		mask = STATUS_LED_BIT2;
+		__led_set(mask, state);
+	}
+	else
+#endif
+#if defined(STATUS_LED_BIT3) && defined(CONFIG_BOARD_SPECIFIC_LED)
+	if (strcmp(argv[1], "3") == 0) {
+		mask = STATUS_LED_BIT3;
+		__led_set(mask, state);
+	}
+	else
+#endif
+#ifdef STATUS_LED_RED
+	if (strcmp(argv[1], "red") == 0) {
+		if (state == 0)
+			red_LED_off();
+		else
+			red_LED_on();
+	}
+	else
+#endif
+#ifdef STATUS_LED_GREEN
+	if (strcmp(argv[1], "green") == 0) {
+		if (state == 0)
+			green_LED_off();
+		else
+			green_LED_on();
+	}
+	else
+#endif
+#ifdef STATUS_LED_YELLOW
+	if (strcmp(argv[1], "yellow") == 0) {
+		if (state == 0)
+			yellow_LED_off();
+		else
+			yellow_LED_on();
+	}
+	else
+#endif
+#ifdef STATUS_LED_BLUE
+	if (strcmp(argv[1], "blue") == 0) {
+		if (state == 0)
+			blue_LED_off();
+		else
+			blue_LED_on();
+	}
+	else
+#endif
+	if (strcmp(argv[1], "all") == 0) {
+		mask = 0
+#if defined(STATUS_LED_BIT) && defined(CONFIG_BOARD_SPECIFIC_LED)
+			| STATUS_LED_BIT
+#endif
+#if defined(STATUS_LED_BIT1) && defined(CONFIG_BOARD_SPECIFIC_LED)
+			| STATUS_LED_BIT1
+#endif
+#if defined(STATUS_LED_BIT2) && defined(CONFIG_BOARD_SPECIFIC_LED)
+			| STATUS_LED_BIT2
+#endif
+#if defined(STATUS_LED_BIT3) && defined(CONFIG_BOARD_SPECIFIC_LED)
+			| STATUS_LED_BIT3
+#endif
+			;
+#ifdef CONFIG_BOARD_SPECIFIC_LED
+		__led_set(mask, state);
+#endif
+#ifdef STATUS_LED_RED
+		if (state == 0)
+			red_LED_off();
+		else
+			red_LED_on();
+#endif
+#ifdef STATUS_LED_GREEN
+		if (state == 0)
+			green_LED_off();
+		else
+			green_LED_on();
+#endif
+#ifdef STATUS_LED_YELLOW
+		if (state == 0)
+			yellow_LED_off();
+		else
+			yellow_LED_on();
+#endif
+#ifdef STATUS_LED_BLUE
+		if (state == 0)
+			blue_LED_off();
+		else
+			blue_LED_on();
+#endif
+	} else {
+		printf ("Usage:\n%s\n", cmdtp->usage);
+		return 1;
+	}
+
+	return 0;
+}
+
+U_BOOT_CMD(
+	led, 3, 1, do_led,
+	"led\t- ["
+#if defined(STATUS_LED_BIT) && defined(CONFIG_BOARD_SPECIFIC_LED)
+	"0|"
+#endif
+#if defined(STATUS_LED_BIT1) && defined(CONFIG_BOARD_SPECIFIC_LED)
+	"1|"
+#endif
+#if defined(STATUS_LED_BIT2) && defined(CONFIG_BOARD_SPECIFIC_LED)
+	"2|"
+#endif
+#if defined(STATUS_LED_BIT3) && defined(CONFIG_BOARD_SPECIFIC_LED)
+	"3|"
+#endif
+#ifdef STATUS_LED_GREEN
+	"green|"
+#endif
+#ifdef STATUS_LED_YELLOW
+	"yellow|"
+#endif
+#ifdef STATUS_LED_RED
+	"red|"
+#endif
+#ifdef STATUS_LED_BLUE
+	"blue|"
+#endif
+	"all] [on|off]\n",
+	"led [led_name] [on|off] sets or clears led(s)\n"
+);
+
-- 
1.5.6.4